macro lens help

[josee1013]

I want to get a macro lens for my Pentax *ist DL... the lens I have with it is a 18-55mm.
what should I go for?

 

[BlueCorn]

Take a look here:

http://reefcentral.com/forums/showthread.php?t=1762095

90-100mm-ish range works very well for aquarium photography.